Research Article

Early Warning for the Construction Safety Risk of Bridge Projects Using a RS-SSA-LSSVM Model

Table 1

Primary early-warning indicators of bridge construction safety risk.

Primary indicatorSecondary indicatorUnitIndicator typeData collection method

A1: MenA11: Rate of operation violation%Quantitative benefit indicatorOn-site investigation and statistics
A12: Rate of improper emergency handling%Quantitative benefit indicatorOn-site investigation and statistics
A13: Acceptance rate of worker technology%Quantitative cost-based indicatorsOn-site investigation and statistics
A14: Safety skills of managersQualitative cost indicatorExpert investigation

A2: MachinesA21: Unqualified rate of mechanical quality%Quantitative benefit indicatorField test and statistics
A22: Failure rate of mechanical installation%Quantitative benefit indicatorField test and statistics
A23: Rate of mechanical operation error%Quantitative benefit indicatorOn-site investigation and statistics
A24: Rate of mechanical failure%Quantitative benefit indicatorOn-site investigation and statistics

A3: MaterialsA31: Qualified rate of concrete%Quantitative cost-based indicatorsField test and statistics
A32: Qualified rate of steel%Qualitative cost-based indicatorField test and statistics
A33: Rationality of material stackingQualitative cost-based indicatorExpert investigation
A34: Sampling inspection of materialsQualitative cost-based indicatorExpert investigation

A4: MethodsA41: Rationality of monitoring methodQualitative cost-based indicatorExpert investigation
A42: Advancement of calculation methodQualitative cost-based indicatorExpert investigation
A43: Rate of technical disclosure%Quantitative cost-based indicatorsOn-site investigation and statistics
A44: Proportion of new construction scheme%Quantitative benefit indicatorOn-site investigation and statistics

A5: EnvironmentA51: Disaster frequencyQuantitative benefit indicatorConsult design data, local yearbook, etc.
A52: Wind load gradeQuantitative benefit indicatorField experiment and reference specification
A53: Sustainability of engineering projectQualitative cost-based indicatorExpert investigation
A54: Social and economic sustainabilityQualitative cost-based indicatorExpert investigation